Are M4A voice memos supported?

Yes. M4A is the default Voice Memos format on iPhone and works well for transcription.

Is AAC or ALAC better for transcription?

ALAC is lossless and preserves more detail, but AAC works well when recorded cleanly.

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Transcribe M4A to Text

Apple-friendly audio container common on iPhone and macOS.

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What is M4A?

M4A is an audio-only MP4 container, often encoded with AAC or ALAC. It is the default for iPhone Voice Memos.

Transcription quick facts

Common use: iPhone voice memos
Quality tip: Record in a quiet room
Watch out for: Phone mics pick up room echo

Best use cases

iPhone voice memos
Mobile interviews and notes
Lecture recordings from phones

Common pitfalls

Phone mics pick up room echo
Automatic gain can cause volume swings
Files may have generic names if you forget to label them

Tips for higher accuracy

Record in a quiet room
Keep the phone close to the speaker
Use lossless ALAC when available for higher quality

Sample M4A transcript

Interviewer: Can you summarize the finding?
Participant: We saw a 12% lift after week two.
Interviewer: What changed in the flow?
Participant: We removed one step from signup.
Interviewer: Anything else notable?
Participant: The drop-off moved to the pricing page.